def cosh(c):
"Hyberbolic cosine."
if c.inf > 0:
return (crlibm.cosh_rd(c.inf), crlibm.cosh_ru(c.sup)),
if c.sup < 0:
return (crlibm.cosh_rd(c.sup), crlibm.cosh_ru(c.inf)),
else:
return (1.0, fpu.max(crlibm.cosh_ru(x) for x in c)),
def cosh(c):
"Hyberbolic cosine."
if c.inf > 0:
return (crlibm.cosh_rd(c.inf), crlibm.cosh_ru(c.sup)),
if c.sup < 0:
return (crlibm.cosh_rd(c.sup), crlibm.cosh_ru(c.inf)),
else:
return (1.0, fpu.max(crlibm.cosh_ru(x) for x in c)),
def tanh_rd(x):
if x < 0:
return -tanh_ru(-x)
if x == fpu.infinity:
return 1.0
s, c = crlibm.sinh_rd(x), crlibm.cosh_ru(x)
if fpu.infinity in (s, c):
return one_rd
return fpu.down(lambda: s / c)
def tanh_rd(x):
if x < 0:
return -tanh_ru(-x)
if x == fpu.infinity:
return 1.0
s, c = crlibm.sinh_rd(x), crlibm.cosh_ru(x)
if fpu.infinity in (s, c):
return one_rd
return fpu.down(lambda: s/c)
